Bilal wanted to buy a book but he did not have any money, he managed to buy it with the help of his father and two brothers, his father gave him half of the amount that his two brothers gave him, his older brother gave him a third of the millim he took from the others, his yellow brother gave him 10 riyals. How much was the book?

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Rate of Change

The relation between two quantities which displays how much greater one quantity is than another is called ratio.

Slope

The change in the vertical distances is known as the rise and the change in the horizontal distances is known as the run. So, the rise divided by run is nothing but a slope value. It is calculated with simple algebraic equations as: